Doesn't compile with WIN32_LEAN_AND_MEAN

[SK83RJOSH]

I tend to use WIN32_LEAN_AND_MEAN and include what I need where I need it. Unfortunately this breaks CrossWindow's Win32Main.cpp since shellapi.h isn't included by default when defined. I suspect there's likely some other issues with this define, so I figured I'd repo this issue and disable the define for now.